Electromechanical make-and-break movement for electric circuits.



F. DE CANNART DHAMALE. ELECTROMECHANICAL MAKE AND BREAK MOVEMENT FOR ELECTRIC CIRCUITS. APPLICATION FILED DEC 27, 1917.

1 282,388. I Patented Oct. 22, l91&v

2 SHEETS-SHEET 1.

F. DE CANNART DHAMALE.

ELECTROMECHAMCAL MAKE AND BREAK MOVEMENT FOR ELECTRIC cmcuns.

I APPLICATION FILED DEC, 27, I917. 1,282,388.

2 SHEETS-SHEET 2.

[W Fzany'w a am/22 046 Patented Oct. 22, 1918.

and back to terminal 2.

The electromagnet E being energized at-- FRANCOIS n1: CANNART DHAMALE, OF ENFIELD, ENGLAND.

ELECTROMECHANICAL MAKE-ANDrBRE-AK MOVEMENT FOR ELECTRIC CIRCUITS.

Specification of Letters Patent.

Patented Oct. 22, 1918.

Application filed December 27, 1917. Serial No. 209,124.

To all whom it may concern:

Be it known that I, FRANCOIS DE CANNART DHAMALE, a subject of the King of the Belgians, residing at Enfield, Middlesex, England, have invented certain new and useful Improvements in Electromechanical Makeand-Break Movements for Electric Circuits, of which the following is a specification.

My invention relates to an electrome-- ohanical make and break movement for electric circuits in which the break is produced by the inertia of a weight secured at the end of a spring, the whole being-supported or put into motion by'the armature of an electromagnet.

The invention will be more fully understood by the following description taken in conjunction with the accompanying drawings in which- Figure 1 is a side view partly in section of one form of apparatus. 7 c

Fig. 2 is a side view of part of a bell with the invention applied thereo.

Figs. 3 and 4. are details.

Fig. 5, is a detail view showing the contact breaking devices inclosed in a 'bulb. v

Referring to the drawings E is the electromagnet. A is the armature which is supported on a metallic plate B hinged at T to the frame S.

I is an insulating block on which is fixed the spring R, which carries the weight P. V is the platinum tipped screw which makes contact at C with the spring R V is an adjusting screw to limit the range of movement of the armature A when pulled back by spring R V, is a screw to adjust the tension of spring R,. H is a gas tight cover which may be fixed on plate B and inclose hermetically the contact C so allowing the make and break movement to be used in any explosive atmosphere.

0 is a gas tight cap covering screw V The action is as follows :-When the circuit is closed, the current flows through the flexible wire F from terminal 1 to the screw V which is connected to the spring R through the insulating block I, and thence from" spring R to screw V plate B, frame S, screw V connection F and then through the coils of the electromagnet E to wire 3 tracts the armature A which is arrested by a stop N. The weight P being supported on a spring R continues its forward movement owing to its inertia and breaks the contact at. C. The armature then falls back to its first position under the action of the spring R The weight P under the action of spring IR flies back also to make contact again with screw V and the whole series of operations is repeated, giving a continuous vibratory or trembling movement.

The speed of the make and break movement can be adjusted by diflerent means 1- (1) If this invention be applied to an electric bell or like apparatus, in which the speed of vibration is more or less determined by the maker once for all, it will be noted that the length and flexibility or springiness of spring R, and the amount of the weight P, are fixed, and the adjustment of rate of vibration can be made within certain limits by screw V The tension of spring R, can also be adjusted by the screw V For the same current, the stroke of the armature can be made longer by unscrewing V when the spring R, will be weaker. This adjustment can only be made within certain limits, as the spring R must always be strong enough to pull back quickly the armature A.

(2) If the make and break be applied to an apparatus which requires variation of rate of vibration within fairly wide limits, say from 1 to 15 or more beats per second, the length of the spring R can be altered by means of a sliding piece W (Figs. 3 and 4) secured by a'milled'nut X .or the like, to plate B on which it may move in a slot Y.

he position of the weight P on the spring B, may be also altered. It is obvious that the method of adjustment described in the above paragraph (1), by means of screws V and V is also applicable in this case. In the case described in the above paragraph (1), it is easy to inclose the make and break movement, that is the spring, weight and tip of screw V in gas tlght cover H secured on plate B and hermetically sealed gas.

The lock nut helps to keep it gas tight and The make and break movement above described may either be part of the apparatus it operates, as for instance, in a bell, being carried by the armature which operates the hammer; or it may be constructed with its own magnet as a separate unit and be connected in series in some part of the circuit of the apparatus it is required to operate.

I claim 1. Electro-mechanical make and break de-j 'vlce for an electric circuit, comprislng an electro-magnet, a pivoted armature, a contact on said armature, a welght, a spring carrying said weight and connected to said armature, said weight being adapted to move, under its inertia, away from said contact when said armature is arrested after being attracted by said electro-magnet,and to move again into engagement with said contact under the action of'said spring, substantially as and for the purpose hereinbefore set forth.

2. Electro-mechanical make and break device for an electric circuit, comprising an electro-magnet, a pivoted armature, a contact on said armature, a weight, a spring carrying said weight and connected to said armature, said weight being adapted to move, under its inertia, away from said contact when said armature is arrested after being attracted by said electro-magnet, and to move again into engagement with said contact under the action of said spring, and a gas tight cover for the aforesaid contact spring and weight for the purpose of excluding explosive gas from the neighborhood of said contact, substantially as and for the purpose hereinbefore set forth.

3. Electro-mechanical make and break device for an electric circuit, comprising an electro-magnet, a pivoted armature,a contact on said armature, a weight, a spring carrying said weight and connected to said armature, said weight being adapted to move, under its inertia, away from said contact when said armature is arrested after being attracted by said electro-magnet, and to move again into engagement with said contact under the action of said spring and an electric circuit including in it the aforesaid contact and electro-magnet, substantially as and for the purpose hereinbefore set forth.

In testimony whereof I have signed 'my name to this specification in the presence of two subscribing witnesses.

FRANCOIS D15! GANNART D'HAMALE.

Witnesses A. W. MATHYS, H. MATHYS. 

